        * {
            margin: 0;
            padding: 0;
        }
        
        ul li {
            list-style-type: none;
        }
        
        a {
            text-decoration: none;
        }
        
        .w {
            margin: auto;
            width: 1200px;
        }
        
        body {
            height: 1200px;
            background-color: rgba(0, 0, 0, 0.1);
        }
        
        .header {
            height: 150px;
            /* background-color: #ccc; */
            overflow: hidden;
        }
        
        .header .logo {
            float: left;
            width: 198px;
            height: 42px;
            margin: 50px 30px 35px 30px;
            background-color: red;
            background: url(../image/logo.png) no-repeat scroll;
        }
        
        .header .nav {
            float: left;
            margin: 60px 0px;
        }
        
        .nav li {
            float: left;
            margin: 0 17px;
        }
        
        .nav li a {
            font-size: 20px;
            padding-bottom: 10px;
            text-decoration: none;
            color: black;
        }
        
        .nav li a:hover {
            border-bottom: 2px solid blue;
            color: red;
        }
        
        .header .ipt {
            float: left;
            width: 412px;
            height: 42px;
            margin: 60px 30px;
        }
        
        .ipt input {
            float: left;
            width: 360px;
            height: 40px;
            border: 2px solid green;
        }
        
        .ipt .btn {
            float: left;
            width: 48px;
            height: 42px;
            background: url(../image/btn.png) no-repeat scroll;
        }
        
        .header .user {
            float: right;
            width: 150px;
            height: 60px;
            margin: 50px 20px;
        }
        
        .user img {
            height: 60px;
            vertical-align: middle;
        }
        
        .banner {
            width: 100%;
            height: 421px;
            background-color: blue;
        }
        
        .banner .w {
            margin: 0 auto;
            height: 421px;
            background-color: pink;
            background: url(../image/banner2_20190819_210028.png) no-repeat scroll top;
        }
        
        .banner .w .lside {
            float: left;
            width: 200px;
            height: 421px;
            background-color: rgba(0, 0, 0, 0.1);
        }
        
        .banner .w .lside li {
            height: 40px;
            margin: 7px 10px 8px 15px;
        }
        
        .banner .w .lside li a {
            color: #fff;
            font-size: 16px;
        }
        
        .banner .w .lside li a::after {
            content: '>';
            float: right;
        }
        
        .banner .w .lside li a:hover {
            color: blue;
        }
        
        .banner .w .course {
            float: right;
            width: 230px;
            height: 300px;
            background-color: #fff;
            margin: 60px 2px;
        }
        
        .banner .w .course .hd {
            height: 40px;
            color: #fff;
            font-weight: 400;
            text-align: center;
            background-color: cornflowerblue;
        }
        
        .banner .w .course .botttomcourse {
            height: 180px;
            /* background-color: pink; */
            margin-top: 10px;
        }
        
        .banner .w .course .botttomcourse li {
            height: 50px;
            width: 170px;
            margin: 10px 20px;
            border-bottom: 2px solid #ccc;
        }
        
        .banner .w .course .botttomcourse li h4 {
            font-size: 16px;
            font-weight: 400;
        }
        
        .banner .w .course .botttomcourse li p {
            color: gray;
            font-size: 12px;
        }
        
        .botttomcourse .allcouse {
            color: blue;
            font-size: 16px;
            font-weight: 900;
            text-align: center;
            line-height: 45px;
            display: block;
            width: 170px;
            height: 45px;
            border: 3px solid cyan;
            margin-left: 20px;
        }
        /* 精品推荐 */
        
        .advise {
            height: 60px;
            /* background-color: red; */
            background-color: #fff;
        }
        
        .advise .leftContext h2 {
            float: left;
            width: 150px;
            line-height: 60px;
            color: blue;
            text-align: center;
        }
        
        .advise .centercontent {
            float: left;
            margin-top: 15px;
        }
        
        .advise .centercontent li {
            float: left;
            padding-right: 20px;
            margin: 0 20px;
            border-right: 2px solid #000;
        }
        
        .advise .centercontent li a {
            font-size: 20px;
        }
        
        .advise .reftContext h2 {
            float: right;
            width: 150px;
            line-height: 60px;
            color: blue;
            text-align: center;
        }
        
        .box-hd {
            height: 40px;
            margin-top: 10px;
        }
        
        .box-hd h3 {
            float: left;
            line-height: 40px;
            margin-left: 10px;
            color: black;
            font-weight: 400;
            font-size: 19px;
        }
        
        .box-hd span {
            float: right;
            height: 40px;
            text-align: center;
            line-height: 40px;
            font-size: 19px;
        }
        
        .clearfix::after,
        .clearfix::before {
            content: '';
            display: table;
        }
        
        .clearfix::after {
            clear: both;
        }
        
        .clearfix {
            *zoom: 1;
        }
        
        .box li {
            position: relative;
            float: left;
            width: 230px;
            height: 200px;
            margin-top: 25px;
            /* background-color: red; */
            margin-right: 10px;
            margin-bottom: 70px;
        }
        
        .box li .hot {
            position: absolute;
            top: 0;
            right: -8px;
        }
        
        .box li h4 {
            font-size: 16px;
            font-weight: normal;
            margin: 12px 10px 0px 15px;
        }
        
        .box li .info {
            margin-top: 10px;
            height: 30px;
        }
        
        .box li .info span {
            line-height: 30px;
            font-size: 14px;
            color: orange;
            padding-left: 20px;
        }
        
        .box li .info i {
            font-style: normal;
            margin-left: 15px;
            color: gray;
        }
        
        .footer {
            height: 1200px;
            margin-top: 20px;
        }
        
        .footer .lfooter {
            float: left;
            width: 400px;
            height: 500px;
        }
        
        .footer .lfooter img {
            margin-top: 20px;
        }
        
        .footer .lfooter p {
            font-size: 16px;
            color: gray;
            margin-top: 10px;
        }
        
        .footer .lfooter a {
            display: block;
            margin-top: 10px;
            color: blue;
            width: 150px;
            height: 35px;
            border: 1px solid blue;
            text-align: center;
            line-height: 35px;
        }
        
        .footer .rfooter {
            float: right;
        }
        
        .footer .rfooter dl {
            margin-top: 20px;
            float: left;
            margin-right: 50px;
        }
        
        .footer .rfooter dt {
            margin-bottom: 15px;
            color: #000;
        }
        
        .footer .rfooter dd a {
            color: #000;
        }